Use of volatile: lock singleton : lock « Thread « C# / CSharp Tutorial

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C# / CSharp Tutorial » Thread » lock 
20.15.4.Use of volatile: lock singleton
using System;

class Singleton
{
    static object sync = new object();
    
    static volatile Singleton singleton = null;
    
    private Singleton()
    {
    }
    
    public static Singleton GetSingleton()    
    {
        if (singleton == null)
        {
            lock(sync)
            {
                if (singleton == null)
                singleton = new Singleton();
            }
        }
        
        return(singleton);
    }
}
20.15.lock
20.15.1.Shared resource without lock
20.15.2.Lock Demo
20.15.3.Use lock to synchronize access to an object
20.15.4.Use of volatile: lock singleton
20.15.5.Using Lock
20.15.6.Use the lock object
20.15.7.Multi Threaded Printing (Synchronizing Threads)
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